1. All transactions valued under 50 province marks must be conducted in game, in character. In order to complete any transaction, the physical currency must be transferred at an event and then deposited with the Darkon banker. IE. I want to purchase a ship for my country. The money for the ship must be physically carried from my country to the banker during an event. This must be done in character so that the caravan is open to attack until the transaction is complete.
Rational: This should bring more coin back to the game and open oppourtunities for rogues and other countries to do harm to a rival country by assaulting their caravans. Any assault of course may be witnessed, and that information sold/passed on to the country that just lost the caravan. Drama

2. All transaction valued over 50 province marks must be conducted in game, in character, using a bearer bond (A note issue by the Bank of Darkon of the appropriate value that belongs to whomever controls it.). In order to complete any transaction, the physical note must be transferred at an event and then deposited with the Darkon banker. IE. I want to pay bloody axe 100 province marks to commit to a large scale war against Chosen Blood. I must first obtain the bearer bond for 100 province marks from the banker. I this must physically walk the bond over to Bloody Axe who will then walk it to the banker for deposit. During this time all persons involved in the transfer are in character and open to assault.
Rational: I don't expect anyone to have to cart around an actual wheel barrell full of coin to get anything done, thus the use of bearer bonds. The bonds can be cashed in by anyone to stay true to the spirit of the proposal so that anyone may steal/loot the marker and cash it in themselves. IE. Choosen Blood learning of the transaction intercepts the caravan going to Bloody Axe and steals the bond, thus preventing Bloody Axe from joining the war. IE2. Offa the Rogue disguises himself as a member of Elidor and when no one is looking lifts the bond and saunters off. He then deposits the bond and is a wealthy Rogue. IE3. Waaagh see' sum pasty humies walkin dun ta road an killz dems all. Dez findz a bit of papr fer da toilet on a humie an da bankr sez dat itz worth a lotta salt. Waaagh then cashes the bond with the banker and drinks all night at the tavern.
Thoughts?